The useful life of equipment means the time from when it is new until it is completely unusable.
The useful life of equipment is the time it takes from the time it is put into service until it is beyond repair due to physical wear and tear and is scrapped. The difference between the two is as follows:
A, the main body is different
1, service life: the product in accordance with the designer or manufacturer of the specified conditions of use, to maintain the safe working capacity of the period.
2, service life: machinery and equipment from the beginning of use to be eliminated due to technological obsolescence of the time process.
Two, different determinants
1, service life: by the material of the equipment, manufacturing quality, conditions of use and maintenance conditions and other factors. Because some of these factors are random factors (such as the environment, climate, the operator's technical proficiency, etc.), so the same batch of production equipment, the actual service life will not be completely equal.
2, the service life: depends on the progress of social technology and technology update speed and cycle.
Three, the characteristics of different
1, the service life: including the time taken up by the necessary maintenance. The product exceeds the service life, and then continue to use has been unsafe, there is some kind of accident potential.
2, life: to reasonably determine the total useful life of machinery and equipment, must be from the natural life of machinery and equipment, technical life and economic life of three aspects to be considered.
Baidu Encyclopedia - Useful Life
Baidu Encyclopedia - Total Useful Life